US 11,719,589 B2
Systems and methods for pressure sensor assembly including improved encapsulation material
Jia luan Lau, Singapore (SG); and Cheng Feng Lee, Singapore (SG)
Assigned to DELPHI TECHNOLOGIES IP LIMITED, St. Michael (BB)
Appl. No. 17/420,588
Filed by DELPHI TECHNOLOGIES IP LIMITED, St. Michael (BB)
PCT Filed Dec. 19, 2019, PCT No. PCT/EP2019/086493
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/141096, PCT Pub. Date Oct. 9, 2020.
Claims priority of application No. 10201900061T (SG), filed on Jan. 3, 2019.
Prior Publication US 2022/0082465 A1, Mar. 17, 2022
Int. Cl. G01L 19/14 (2006.01); G01L 9/00 (2006.01); G01L 23/24 (2006.01)
CPC G01L 19/147 (2013.01) [G01L 9/0041 (2013.01); G01L 19/141 (2013.01); G01L 23/24 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pressure sensor assembly for measuring pressure of air in a compression ignition internal combustion engine, the pressure sensor assembly comprising:
an external housing unit;
a sensor unit received within the external housing unit, the sensor unit comprising an external surface including a mounting surface;
a sensing element mounted within the sensor unit and comprising a pressure-sensing surface;
a substrate upon which the mounting surface is mounted;
an air passage which enables impingement of air on the sensing element, in use; and
a filling passage, separate from the air passage, which introduces an encapsulation material onto the sensor unit, during assembly;
wherein the encapsulation material covers at least a part of the external surface of the sensor unit but does not cover the pressure-sensing surface of the sensing element which remains directly exposed to air within the air passage.